Shedding mechanism for looms.



No. 719,289. PATENTED JAN. 27, 1%303- H. WYMAN. SHEDDING MECHANISM FOR LOOMS. APPLICATION FILED APR, 25, 1902.

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\ No. 719,289. PATENTED' JAN. 27,1903.

H. WYMAN.

SHBDDING MECHANISM FOR LOOMS.

APPLIOATION FILED APR. 25. 1902. 10 MODEL.

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No. 719,289. 7 PATENTED JAN. 27, 1903. .H. WYMAN.

SHEDDING MECHANISM FOR LOOMS.

APPLICATION FILED APR. 25. 1902.

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PATENTED JAN. 27, 1903.

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H. WYMAN. SHEDDING MECHANISM FOR LOOMS. APPLICATION nun APR 25, 1902 no MODEL.

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HORACE WYMAN, OF WVORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMP TON do KNOWLES LOOM l/VORKS, OF WORCESTER, MASSACHUSETTS, A- CORPORATION OF MASSACHUSETTS.

.SHEDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 719,289, dated January 27, 1903.

Application filed April 25, 1902. Serial No. 104,588. (No model.)

To all whom, it may concern: at their central position, and as the free ends Be it known that I, HORACE \VYMAN, acitiof the hooks, which are pivoted at one end zen of the United States, residing at Worcesto the carriers and move in the arc of a circle, ter, in the county of Worcester and State of will have alateralmotio'n during their move- Massachusetts, have invented certain new ment, due to the rocking movement of the and useful Improvements in Shedding Mechcarriers,I make the lifter which operates the anism for Looms, of which the following is a hooks move in the are or segment of a circle specification. which is the reverse of the are or segment of My invention relates to shedding mechanthe circle of movement of the carriers,where- TO ism for looms, and more particularly to that by the movement of that part of the hook class of shedding mechanism or harness-m0- upon which the indication takes place is tion termed single-acting dobby, in which practically in the same plane as the movethere is only one lifter-bar moving at every ment of the ends of said hook, so that the inpick to raise the harnesses through intermedications from the pattern cards or surfaces 15 diate mechanism to form the top shed. will be correctly transmitted to the hooks to The object of my invention is to improve determine whether they shall be engaged by upon the construction of single-acting dobthe lifter-bar'or left disengaged to allow the bios of the class referred to as now ordinarily harnesses to be moved into the lower shed by made; and my invention consists in certain the action of the springs attached to the lower 20 novel features of construction of myimproveedge of the harnesses. The axis of the are ments, as will be hereinafter fully described. of the circle in which the lifter moves is on In my improvements as shown in the drawthe opposite side of the hook-jacks from the ings the single-acting dobby mechanism is axis of the arc of the circle in which the carplaced at one end of the arches or top rails riers move.

25 of the loom-frame and secured thereto, with In order to govern the movement of the its upper surface in substantially the same harnesses When moved by the springs athorizontal plane as the sheaves supported in tached thereto to properly move the harthe arches, and over which sheaves'the cords nesses into the lower shed, I provide what I pass to the harnesses, said cords extending term a retarder, moving in the same are 0 in a horizontal plane from the dobby mech= of a circle as the peripheries of the carriers anism to said sheaves. To the lower edges of to which the cords leading to the harnesses the harnesses are attached springs in the orare connected. The carriers have projections dinary way to move into the lower shed the thereon which are engaged by the retarder, harnesses which are not moved into the top which limits the movement of the harnesses 35 shed by the lifter of the dobby mechanism in downward. Said retarder also acts as an the operation of the loom. Between the hooks evener when the sheds are closed to correctly which engage the lifter-bar and the ends of aline the hook-jacks in position free of the the cords leading to the harnesses are placed lifter, whereby the pattern surface or cards, intermediate carriers or transferrers, shown through the needles or wires, will move the 40 in the drawings as pivoted rocking-carriers ends of the hooks into or out of line of movewithcircularperipheries,totransfer themovement of the lifter, all as will be hereinafter ment of the hooks operated by the lifter-bar fully described. to the cords leading to the harnesses. The I have only shown in the drawings a deaxis of the arc of the circle in which the cartached portion of one end of a loom-arch and 45 riers move is located at one side of the hookthe frame of a single-acting dobby mechanjacks. ism and some of the parts of the dobby The indications on the hooks operated by mechanism, with my improvements applied the lifter-bar from the pattern-cards by the thereto, and one end of two harnesses and needles or wires are made about midway becording therefrom to the dobby mechanism 50 tween the ends of said hooks when they are sufficient to enable those skilled in the art to I00 understand the construction and operation of my improvements.

Referring to the drawings, Figure 1 is a side elevation of the frame of a single-acting dobby mechanism with myimprovements applied thereto and showing one end of a loomarch to which the dobby-frame is secured. Fig. 2 corresponds to Fig. 1, but shows the opposite position of the movable parts. The loom-arch is not shown in this figure. Fig. 3 is a vertical section through the parts in the position shown in Fig. 1 and showing the ends of the two harnesses and their operatingsprings and cording leading from one end of the harnesses over the guide-sheaves to the dobbymechanism. Fig.4correspondstoFig.

.1, but shows a modified construction of my improvements on the opposite end of the loom-arch, with the wires of the pattern mechanism working in a vertical instead of a horizontal plane; and Fig. 5 is a vertical section through the parts shown in Fig. 4 and showing the end of a harness and the cording.

In the accompanying drawings,Figs. 1,2,and 3, the part marked 1 is the end of a loom-arch, to which is attached the dobby-frame 1, with its top in substantially the same horizontal planeas the top of the loom-arch. 2 isarockshaft suitably journaled in the frame 1 and having fast thereon at each end a lever 3, with oppositely-extending arms, to the slotted end 3 of one of which is pivotally attached the upper end of a rod or connector 4, which has communicated thereto from some driven part of the loom a regular up-and-down motion at regular intervals to rock the lever 3 and operate the parts connected therewith. Mounted on the shaft 2 and secured to the lever 3 by a bolt 5 is an arm 6, the outer end of which is pivotally connected by a bolt 7 to one end of the link 8. The other end of the link 8 is pivotally connected to a pin 9 on the piston or rod 10, supported and having a reciprocating motion in a horizontal plane in a bearing 11 on the frame 1 in the ordinary way.

The outer end of the piston 10 has a fork 10 thereon which carries a bearing 10", secured thereon by bolts 12 for the projecting ends or journals 13 of the pattern-barrel 13, carrying the pattern-cards 14:, in the usual way.

A hook 15, pivoted at its inner end on a stud 16 on the inside of one end of the frame 1, as shown in Fig. 3, is adapted to engage at its outer end one of the projections 13 on the pattern-barrel 13 to rotate said barrel on the outer movement of the piston 10, caused by the rocking of the lever 3 through arm 6 and link 8, in the usual way. A spring 15, attached to the hook 15, acts to hold it in position to engage the pattern-barrel 13.

In connection with the pattern cards 14, which have perforations 14 therein, (see Fig. 3,) according to the indications desired, are used ordinary indicating needles or wires, two of which17 and 18 are shown. (See Fig. 3.) The indicatingwires 17 and 18 are loosely mounted at their ends in openings in the transversebars 19 and 20 of the dobby-frame, and the horizontal movement of said wires is controlled by theaction of the pattern-cards 14 thereon on the inward and outward movement of the pattern-barrel 13 in the usual 17 and a coil 18 in the wires 17 and 18, re-

spectively, strikes against the inner surface of the transverse bar 19 and limits the outer motion of the wires moved by a spiral spring 21, encircling each wire and extending between the transverse bar 20 and the coils 17 and 18 in the central part of each wire 17 and 18, in the usual way.

Through each of the coils 17" and 18" in the central part of the wires 17 and 18loosely extends a hook-jack 22 and 23, respectively. The lower end of each jack 22 and 23 is hooked, as shown in Fig. 3, and adapted to extend under the lower edge of the lifter-bar 24,whioh extends at its ends through a slot 25 in the lower part of the frame, said slot being in the form of a segment or are of a circle with its axis on the outer side of the frame 1.

To each end of the lifter 24 is pivotally secured, on a stud or journal 24, the lower end of a link 26, which is pivotally secured at its upper end by a bolt 27 to the rocking lever 3, as shown in Figs. 1 and 2. The upper end of each hook-jack 22 and 23 is pivotally connected to a rocking lever-or arm 28, having an open end slot 28, which engages a transverse rod 29,extending between the end plates of the frame 1, and which rod acts as a pivotsupport for the levers 28. A transverse rod 30, extending through a curved slot 28 in the lovers 28, (see Fig. 3,) acts to hold the levers on their pivot-support 29. The levers 28 are in this instance made in the form of a segment of a circle, as shown in Fig. 3, and I term these levers carriers or transferrers.

On the periphery of each lever 28 is a hook or projection 28", over which extends a metal loop 32 on the end of the cord 33, which passes over the guide-sheave 34, mounted on the transverse rod. 35, and is divided and its ends secured to the upper edge of the harness 36. To the lower edge of the harness 36 is secured at each end the upper end of the spring 37. The lower end of said spring is secured to some stationary part. Also on the periphery of the lover or carrier 28 is a notch 28, which is adapted to be engaged by a transverse bar 38, extending at its ends through slots 39 in the upper part of the frame 1. (See Figs. 1 and 2.) The slot 39 extends in the segment or are of a circle, with its axis on the inner side of the frame-1that is, in the reverse direction to the arc of a circle of the slot 25.

The transverse bar 38, which I term a retarder, has on its ends projecting studs 38', to which are pivotally attached the upper ends of links 40. The lower ends of the links 40 extend through the hub 41, pivotally attached bya bolt=t2 to one arm of the rocking lever 3, and are adjustable in said hub 41 by nuts It will be understood that the parts shown in Figs. 1 and 2 on the outer part of the frame 1 are duplicated on the outside of the other end of the frame. (Not shown.) It will also be understood that there is one indicator wire or needle and one hook-jack and one rocking lever or carrier for each harness.

The operation of my improvements shown in Figs. 1, 2, and 3 will be readily understood by those skilled in the art from the above description, in connection with the drawings.

The rocking of the levers 3 through the movement of the rod at will through the link 26 and the link 40 communicate a regular movement to the lifter-bar 24 and the retarderbar 38 to move them away from each other and toward each other, the movement conforming to the curvature of the slots 25 and 39 in which they respectively move.

The downward movement of the lifter-bar 21, if the pattern surface or cards indicate for the engagement of said bar by the hook-jack, will move downwardly said jack and rock the lever or. carrier 28 to raise the harness connected therewith, as shown in Fig. 3, while the non-engagement of the hook-jack with the lifter-bar 24 will allow the springs 37 to act to draw down the harness and move the lever or carrier 28,with the retarder-bar 38, as shown in Fig. 3, the retarder-bar 3S acting to limit the downward movement of the harnesses.

The engagement of the retarder-bar 38 with the carriers or transferrers 2S and the downward movement of said retarder-bar will place all the harnesses in the same plane.

Referring now to Figs. 4 and 5, in which is shown a modified form of my improvements shown in Figs. 1, 2, and 3, the construction and operation of the several parts of the modified form of my improvements shown in Figs. 1 and 5 are substantially the same as the form of my improvements shown in Figs. 1, 2, and 3, except that the hook-jacks extend in a horizontal plane and the indicating-wires extend in a vertical plane. In Figs. 4 and 5 the same numerals of reference are used as are used in Figs. 1, 2, and 3 to designate similar parts, and a description of said parts, which operate the same as the parts in Figs. 1, 2, and 3, is therefore not deemed necessary.

It will be understood that the details of construction of my improvements may be varied, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a shedding mechanism for looms, the combination of a rocking carrier, a harness connection attached to the periphery of said rocking carrier, a hook-jack connected to said carrier, alifter-bar, pattern-controlled means for determining the engagement of said hook and lifter-bar, the said rocking carrier havmg a peripheral notch as 28", a retarder or evener bar for engagement with said notch, and means for operating the lifter-bar and retarder.

2. In a shedding mechanism for looms, the combination of the loom-frame, a rocking carrier having a circular periphery and provided with a notch, as 28"". a retarder movable in a circular path coincident with the circular periphery of the rocking carrier and adapted to engage the said notch, a lifter-bar, a hookjack connected to the carrier and adapted to engage the lifter-bar, and means for moving the lifter-bar in a circular path the reverse of the path of movement of the carrier.

3. In a shedding mechanism for looms, the combination of the loom-frame, a rocking carrier having a circularly-formed periphery and provided with a peripheral notch, a harness connection joined to the periphery of the rocking carrier, a lifting-bar and a retarder, curved guides one for the lifting-bar and one for the retarder, said guides being reversely curved, a two-armed lever connected to the lifting-bar and retarder, and means for operating said two-armed lever.

4. In the shedding mechanism of a loom, a hook-jack, a pivoted carrier which moves in the arc of a circle the axis of which is on one side of said hook-jack, said carrier being connected to the hooked jack, a lifter-bar which moves in the arc of a circle the axis of which is on the opposite side of said jack, said lifterbar being engaged by said hook-jack, sub stantially as shown and described.

5. In the shedding mechanism of a loom, a hook-jack, a pivoted carrier for one end of the jack, a lifter for the other end of the jack, and means to move said carrier and lifter in opposite directions in arcs of circles the reverse of each other, substantially as shown and described.

6. In the shedding mechanism of a loom, a hook-jack, a pivoted carrier provided with a projection for one end of said jack, a retarder or evener bar, and means to move it in the are of a circle coinciding with the movement of the projection on the carrier, substantially as shown and described.

7. In the shedding mechanism of a loom, the combination with a frame comprising two side pieces, each side piece provided with curved slots, one for the lifter, and the other for the retarder or evener bar, of said lifter and retarder adapted to move in said curved slots, and means to move the same, substantially as shown and described.

8. In the shedding mechanism of a loom, the combination with a frame comprising two side pieces provided with two curved slots, one for the lifter,and one for the retarder, of said lifter and retarder,and a pivoted rocking carrier, the pivotal point of which coincides with the axis of the arc of a circle in which the retarder moves, substantially as shown and described.

9. In the shedding mechanism of a loom, a harness provided with a bottom spring, a harness connection, one end of which is movable ina substantially horizontal plane, a hook-jack, a pivoted carrier intermediate said harness connection and said hook-jack, and a retarder or evener bar for said carrier, in combination with a lifter, a frame comprising two side pieces having curved slots therein, one for the lifter, and the other for the retarder orevener bar, substantially as shown and described.

10. In the shedding mechanism of a loom, a harness provided with a bottom spring, a harness connect-ion, one end of which is movable in a substantially horizontal plane, a hook-jack movable in a substantially vertical plane, a pivoted carrier intermediate said harness connection and said hook-jack, to transfer the movement of the hook-jack to said harness connection with an angular movement, substantially as shown and described.

11. In the shedding mechanism of a loom, the combination with a frame comprising two side pieces each having a curved slot therein,

of a series of pivoted carriers having pro jections on their peripheries, the curvature of said peripheries corresponding with the curvature of said curved slot, and the retarder or evener bar to move in said curved slot and in contact with the projections on the carriers, substantially as shown and described.

12. In the shedding mechanism of a loom, a harness provided with a bottom spring, a har- 35 ness connection, one end of which is movable in a substantially horizontal plane, a hook-jack, a pivoted carrier intermediate said harness connection and said hook-jack and provided on its periphery with a projection for the harness connection, and a projection to cooperate with the retarder or evener bar, and said retarder or evener bar intermediate the two projections, substantially as shown and described.

HORACE WYMAN.

Witnesses:

J. C. DEWEY, M. HAAS. 

